Cost is one factor. A single 3-1000Z costs much more than a pair of
3-500Zs. 4-1000A tubes were once plentiful as broadcast pulls and were very
popular in homebrew amps because you could get good serviceable used tubes
for very little cost.
Mike, W1NR
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Gudguyham@aol.com
Sent: Sunday, May 28, 2006 9:24 PM
To: aa4lr@arrl.net; jbigham2@kc.rr.com
Cc: amps@contesting.com
Subject: Re: [Amps] 4-1000 amp
In a message dated 5/28/2006 7:16:12 P.M. Eastern Standard Time,
aa4lr@arrl.net writes:
Curious question -- I recently wondered why it is that the 3-1000Z was
never that popular a tube in amateur circles, but the 3-500Z was.
Why did many amateur designs use two 3-500Zs instead of one 3-1000Z.
Seems like it would simplify things. One bottle and you could to the legal
limit with a simple grounded-grid circuit.
The market made some determination, as 3-500Zs are still being made, and
3-1000Zs are unobtainium....
Not positive to the answer to this but I think it has to do with the
physical size of the tube. Could you imagine the size of an Sb-220 if it
used a 3-1000? Hunter used one in their amp and it was not a very popular
amp. There may be other reasons, but -physical size comes to my mind right
away.
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